I got 20,737 but I could be wrong so I will attach my algorithm and work.
 
        
             
        
        
        
Create and solve an appropriate equation:  Maria's earnings = Liam's earnings
                                                                       0.20x                 = $625+0.10x.
Find x.
0.10x = $625; thus, x = $6250.  At this level of food sales, these two people earn the same amount.
        
             
        
        
        
m + 4 = 5m - 12
Subtract m from both sides.
4 = 4m - 12
Add 12 to both sides
16 = 4m
Divide both sides by 4
m = 4
 
        
                    
             
        
        
        
I think it's (3) Calculate the nth term rule of the sequence
(I think
the answer to the equation is 8xy+36x+6y+9)
        
                    
             
        
        
        
The Answer is B.
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<em><u>Hope this Helps!</u></em>